VIDEO: Jimmy Fallon & Jonathan Groff Sing HAMILTON's 'You'll Be Back'

Jimmy Fallon performs the comedic number "You'll Be Back" on the recently released HAMILTON Mixtapes. So on this week's TONIGHT SHOW, he decided to teach guest Jonathan Groff, who popularized the tune as King George III in Broadway's HAMILTON, the proper breathing techniques for singing the song. Check out the clip below!

Jonathan Groff received a 2016 Tony Award nomination for Best Performance by an Actor in a Featured Role in a Musical for his role as King George III in HAMILTON. He recently starred in the HBO series LOOKING and will soon appear in David Fincher's upcoming MINDHUNTER series on Netflix. Groff's other TV credits include THE NORMAL HEART, GLEE and BOSS. He also voiced the role of 'Kristoff' in Disney's animated mega-hit FROZEN and its follow-up short FROZEN FEVER.

Aside from his role as 'King George III' in Broadway's HAMILTON, Groff has recently taken the stage in Encores! Off-Center's A NEW BRAIN. He is well known for starring in the original cast of SPRING AWAKENING. Among Groff's other stage credits are IN MY LIFE on Broadway, THE SUBMISSION, THE SINGING FOREST and PRAYER FOR MY ENEMY off-Broadway, and DEATHTRAP in the West End.